4 Pole Type 2 Surge Protection Device (WSPD440)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WSPD440 is a 4 Pole Type 2 Surge Protection Device designed for 230/400V three-phase + neutral systems. It helps protect electrical and electronic equipment from transient overvoltages caused by switching events and lightning-related surge activity. With a 20kA nominal discharge current and 40kA maximum discharge rating, this 3 phase...
The WSPD440 is a 4 Pole Type 2 Surge Protection Device designed for 230/400V three-phase + neutral systems. It helps protect electrical and electronic equipment from transient overvoltages caused by switching events and lightning-related surge activity.
With a 20kA nominal discharge current and 40kA maximum discharge rating, this 3 phase surge protection device provides protection across L1, L2, L3 and Neutral. Its compact DIN rail format makes it suitable for compatible three-phase boards, commercial distribution systems and enclosure assemblies.
Installer note: The WSPD440 is a 3P+N SPD for three-phase systems with neutral protection. For three-phase arrangements without neutral protection, compare with the WSPD340 3 Pole SPD.
- 4 Pole Type 2 SPD – 3P+N surge protection for three-phase + neutral systems
- 20kA nominal / 40kA maximum discharge rating – protection against transient overvoltages
- Protects L1, L2, L3 and Neutral – suited to 230/400V three-phase systems
- DIN rail mounted – compact format for board and enclosure integration
- Mechanical status indication – red / green visual indicator by pole
- 72mm wide body – compact 3P+N Type 2 SPD format
- IEC 61643-11 compliant – recognised SPD standard
WSPD Type 2 Surge Protection Device Range
| Product | Configuration | Dimensions | Typical Use |
|---|---|---|---|
| WSPD140 | 1P 20kA / 40kA Type 2 | 18 × 90 × 65mm | Compact single-module surge protection |
| WSPD240 | 2P 20kA / 40kA Type 2 | 36 × 90 × 65mm | Single-phase 230V boards and consumer units |
| WSPD340 | 3P 20kA / 40kA Type 2 | 54 × 90 × 65mm | Three-phase surge protection without neutral protection |
| WSPD440 | 3P+N 20kA / 40kA Type 2 | 72 × 90 × 65mm | Three-phase and neutral surge protection |
3 Phase Surge Protection with Neutral Protection
A 4 pole surge protection device is used where surge protection is required across all three phases and neutral. This makes the WSPD440 suitable for compatible three-phase distribution boards, commercial switchgear and systems where a 3P+N SPD is specified.
Compared with a 3 pole SPD, the WSPD440 includes neutral protection as part of the device configuration. This makes it the correct option where the board design or earthing arrangement calls for three-phase + neutral surge protection.
The compact 72mm DIN rail format allows it to be fitted into suitable boards or enclosures where Type 2 surge protection is required.
What is the WSPD440 used for?
The WSPD440 is a 4 pole Type 2 surge protection device used to help protect 230/400V three-phase + neutral systems from transient overvoltages.
Is the WSPD440 a 3 phase surge protection device?
Yes. The WSPD440 is a 3P+N surge protection device for three-phase systems where protection is required across L1, L2, L3 and Neutral.
What is the difference between the WSPD340 and WSPD440?
The WSPD340 is a 3 pole SPD for L1, L2 and L3 protection. The WSPD440 is a 4 pole / 3P+N SPD for three-phase systems where neutral protection is also required.
What discharge rating does the WSPD440 have?
The WSPD440 has a 20kA nominal discharge current and 40kA maximum discharge rating.
How is the WSPD440 mounted?
The WSPD440 is designed for mounting onto a standard 35mm DIN rail inside a suitable enclosure or distribution board.
What does the red / green indicator show?
The mechanical indicator provides a visual check of SPD condition by pole during inspection and maintenance.
| Product Code | WSPD440 |
| Product Type | Type 2 Surge Protection Device |
| Configuration | 4 Pole / 3P+N |
| Network | 230/400V three-phase + neutral |
| Nominal Discharge Current (In) | 20kA |
| Maximum Discharge Current (Imax) | 40kA |
| Max. AC Operating Voltage (Uc) | 275V |
| Combination Waveform (Uoc) | 6kV |
| Protection Level (Up) | 1.5kV |
| Connection to Network | Screw terminals, 2.5–25mm² |
| Mounting | 35mm DIN rail |
| Operating Temperature | -40°C to +85°C |
| Protection Rating | IP20 |
| Back-Up Fuse | 125A max. gL / gG |
| Status Indicator | Mechanical red / green indicator by pole |
| Standards | IEC 61643-11 / EN 61643-11 |
| Dimensions (W × H × D) | 72 × 90 × 65mm |
The WSPD440 4 pole Type 2 SPD should be installed by a qualified electrician as part of a suitable 230/400V three-phase + neutral surge protection arrangement.
- Install inside a suitable enclosure or distribution board
- Connect to the appropriate L1, L2, L3 and Neutral supply terminals
- Use conductor sizes within the stated terminal capacity of 2.5–25mm²
- Keep connecting and earth conductors as short as practical
- Check the mechanical red / green status indicators during commissioning and inspection
- Refer to the correct SPD wiring arrangement for the earthing system in use
Specification note: The WSPD440 is a 3P+N surge protection device. Confirm the board design, earthing arrangement and neutral protection requirements before installation.
